knock sensor wiring...

[peptobrian]

Hello, I have a 1995 240sx se it is throwing a code to replace knock sensor and 02 sensor. I have replaced both but the code is still being thorwen. I then put a test light to the wires running to the knock sensor, neither one where hot. Shouldn't the wire that runs to the knock sensor be hot? Also I can't find a diagram of it. Does anyone know where I can get one?